Download 4.3 - Brandeis

© Judith Herzfeld 1997,1999
These exercises are provided here for
classroom and study use only.
All other uses are copyright protected.
© Judith Herzfeld 1997, 1999
4.3-110
For a particle in a 2D rectangular box, the
number of lobes of electron density in the
nx=2, ny=5 state is
(a)
(c)
2
5
(b)
(d)
3
10
The number of nodal lines is
(a)
(c)
© Judith Herzfeld 1997, 1999
1
4
(b)
(d)
2
5
4.3-210
The electron density of a given state of a 2D
H-atom is given by the contour map
This state has
(a) 1 angular node only
(b) 1 radial node only
(c) 1 angular node and 1 radial node
(d) 2 angular nodes
The quantum numbers for this state are
(b) n = 2, l = 1
(a) n = 2, l = 0
(c) n = 3, l = 1
(d) n = 3, l = 2
© Judith Herzfeld 1997, 1999
4.3-310
The number of angular nodes in a 3s atomic
orbital is
(a) 0
(c) 2
(b) 1
(d) 3
The number of radial nodes in a 3s atomic
orbital is
(a) 0
(c) 2
© Judith Herzfeld 1997, 1999
(b) 1
(d) 3
4.3-320
An atomic orbital has 2 angular nodes and 1
radial node. It is a
(a) 2p
(c) 3d
orbital.
© Judith Herzfeld 1997, 1999
(b) 3p
(d) 4d
4.3-330
Among the designations
n = 3, l = 2, ml = -2
II. n = 3, l = 1, ml = 0
III. n = 3, l = 0, ml = -1
IV. n = 3, l = 2, ml = 0
V. n = 3, l = 3, ml = -2
I.
which does not describe an allowed state for
an electron in an atom?
(a) II and IV
(c) III and V
© Judith Herzfeld 1997, 1999
(b) I and III
(d) IV and V
4.3-340
Which of the following is not an atomic
orbital?
(a) 2p
(c) 3f
© Judith Herzfeld 1997, 1999
(b) 5s
(d) 4d
4.3-350
What is the full degeneracy of the n=3 state
of a H-atom (in the absence of a magnetic
field)?
(a) 4
(c) 8
© Judith Herzfeld 1997, 1999
(b) 10
(d) 18
4.3-411
(1s)2(2s)2(2px)2 represents a configuration of
a
(a) beryllium
(b) boron
(c) carbon
(d) nitrogen
atom.
© Judith Herzfeld 1997, 1999
4.3-412
The (1s)2(2s)2(2px)2 state of a carbon atom
is
(a) the ground state
(b) an excited state
© Judith Herzfeld 1997, 1999
4.3-420
Which of the following represents the ground
state of a nitrogen atom?
(a)
(1s)2(2s)2(2px)
(b)
(1s)2(2s)2(2px)3
(c)
(1s)2(2s)2(2px)2(2py)
(d)
(1s)2(2s)2(2px)(2py)(2pz)
Which represents an excited state of a
nitrogen atom?
Which is not a state of any atom at all?
© Judith Herzfeld 1997, 1999
4.3-425
Which of the following is not an excited state
of a silicon atom?
(a) (Ne)(3s)(3px)(3py)(3pz)
(b)
(Ne)(3s)2(3px)2
(c)
(Ne) (3s)2(3px)(3py)
(d)
(Ne)(3px)2(3py)(3pz)
© Judith Herzfeld 1997, 1999
4.3-430
The electronic configuration of element X is
(1s)2(2s)2(2p)6(3s)2(3p)3. The formula of the
most probable compound that X will form with
Ca is
(b) Ca3X2
(a) CaX2
(c)
Ca2X
© Judith Herzfeld 1997, 1999
(d)
Ca2X3
4.3-440
The ground state electronic configuration of
Fe3+ is
(a)
(Ar)183d34s2
(b)
(Ar)183d64s2
(c)
(Ar)183d5
(d)
(Ar)183d44s
© Judith Herzfeld 1997, 1999
4.3-450
Which of the following sets of quantum
numbers, n, l, ml and ms, describes one of
the outermost electrons in a ground state
strontium atom?
(a) 5,1,1,+1/2
(b) 5,0,1,+1/2
(c) 5,0,0,-1/2
(d) 5,2,1,-1/2
© Judith Herzfeld 1997, 1999
4.3-460
Which of the following ions is paramagnetic?
(a)
Ag+
(b)
Zn2+
(c)
Ni2+
(d)
Sc3+
© Judith Herzfeld 1997, 1999
4.3-470
Which of the following atoms has the largest
number of unpaired electrons in its ground
state?
(a) Sn
(b) Ag
(c) Rh
(d) Mo
© Judith Herzfeld 1997, 1999
4.3-480
Suppose that the electron spin quantum
number could have three possible values.
Which of the following atomic numbers would
not correspond to a noble gas?
(a)
3
(b) 15
(c) 27
(d) 42
© Judith Herzfeld 1997, 1999
4.3-510
Of the following, the atom with the largest first
ionization energy is the one with the ground
state electronic configuration
(a)
(Ne) 3s23p1
(b)
(Ne) 3s23p2
(c)
(Ne) 3s23p3
(d)
(Ne) 3s23p4
© Judith Herzfeld 1997, 1999
4.3-520
Of the following, the atom with the smallest
first ionization energy is the one with the
ground state electronic configuration
(a)
(Ne) 3s2
(b)
(Ne) 3s23p 1
(c)
(Ne) 3s23p2
(d)
(Ne) 3s23p3
© Judith Herzfeld 1997, 1999
4.3-530
Of the following, the atom with the smallest
first ionization energy is the one with the
ground state electronic configuration
(a)
1s2 2s22p3
(b)
(Ne) 3s23p 3
(c)
(Ar) 3d104s24p3
© Judith Herzfeld 1997, 1999